KR20240004034A - Water charge air cooler assembly of lean burn intake system - Google Patents

Abstract

A water-cooled intercooler assembly for a lean-burn intake system is disclosed. The water-cooled intercooler assembly of the lean-burn intake system according to an exemplary embodiment of the disclosed present invention includes i) a housing with open upper and lower ends and coupled to the intake manifold through the upper end, ii) a coolant passage through which the coolant passes, and an intake It includes a charge air passage connected to the manifold and a bypass passage formed along the inner center of the housing and connected to the intake manifold, a heat exchanger installed inside the housing, and iii) a charge air passage and bypass. It may include an inlet tank that includes a charge air inlet connected to the passage and is coupled to the lower end of the housing, and iv) a valve assembly that is installed in the inlet tank and selectively opens and closes the bypass passage by driving an actuator. .

Description

Water-cooled intercooler assembly of lean burn intake system {WATER CHARGE AIR COOLER ASSEMBLY OF LEAN BURN INTAKE SYSTEM}

Embodiments of the present invention relate to an intake system applied to a lean burn engine, and more specifically, to a water-cooled intercooler assembly configured to cool charge air with coolant.

Recently, in accordance with global exhaust gas emission regulations, the number of vehicles equipped with traditional internal combustion engines is decreasing, and electric vehicles or hybrid vehicles with low exhaust gas emissions are increasing.

Among these, a hybrid vehicle is a vehicle that uses two or more power sources consisting of an engine and a drive motor. Since the drive motor of a hybrid vehicle assists the power of the engine, the engine applied to the hybrid vehicle is mainly operated at the highest thermal efficiency operating point (or optimal operating point).

When low-temperature combustion is implemented using lean burn combustion mode at the highest thermal efficiency operating point, the specific heat ratio increases because the combustion temperature is lowered, thereby improving the efficiency of the hybrid vehicle.

In such hybrid vehicle engines (eg, lean-burn engines), the intake system includes a supercharger (eg, electric supercharger) and a water-cooled intercooler. The supercharger pressurizes the intake air using the pressure of the exhaust gas discharged from the engine's exhaust system. And, the water-cooled intercooler cools the supercharged air compressed by the supercharger as coolant.

Meanwhile, the cooling structure in a hybrid vehicle consists of a low-temperature integrated cooling circuit that cools engine parts and electric motorization (PE) parts. This low-temperature integrated cooling circuit includes a series cooling method that connects engine parts and electric components in series to circulate coolant, and a bypass cooling method that circulates coolant by bypassing the water-cooled intercooler in the series cooling method.

However, due to the integrated cooling circuit of the engine parts and electric parts, in conditions where the heat generated by the electric parts is greater than the heat generated by the engine's supercharging, the intake air temperature rises due to the coolant temperature raised by the heat generated by the electric parts, and this causes By causing a decrease in volumetric efficiency, engine performance and fuel efficiency may deteriorate.

Furthermore, when the coolant is circulated by bypassing the water-cooled intercooler to minimize the heat generation effect of the electric motorized parts as described above, since the charge air passes through the water-cooled intercooler, the flow resistance of the charge air increases, resulting in a decrease in volumetric efficiency. can cause

The matters described in this background art section have been written to improve understanding of the background of the invention, and may include matters that are not prior art already known to those skilled in the art in the field to which this technology belongs.

Embodiments of the present invention seek to provide a water-cooled intercooler assembly of a lean-burn intake system that bypasses charge air to minimize the effect on heat generation of electric components and minimizes flow resistance of charge air.

The water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention includes i) a housing with open upper and lower ends and coupled to the intake manifold through the upper end, ii) a coolant passage through which coolant passes, the intake manifold, and a heat exchanger installed inside the housing, including a connected supercharge air passage, and a bypass passage formed along the inner center of the housing and connected to the intake manifold; iii) the charge air passage and the an inlet tank including a charge air inlet connected to the bypass passage and coupled to the lower end of the housing; iv) a valve assembly installed in the inlet tank and selectively opening and closing the bypass passage by driving an actuator; may include.

Additionally, in the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention, the housing has a coolant inlet provided at the top and connected to the coolant passage, and a coolant outlet provided at the bottom and connected to the coolant passage. May include wealth.

Additionally, in the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention, the heat exchange unit includes a plurality of tubes arranged concentrically at a set interval and having the charge air passage formed therein, and the plurality of tubes. It may include a supporter coupled to the upper and lower ends of the housing, respectively, to set a gap between the tubes and to form the coolant passage between the plurality of tubes.

In addition, in the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention, each of the plurality of tubes is provided in an arc shape and extends in the circumferential and radial directions with the bypass passage at the center. It can be placed spaced apart accordingly.

Additionally, in the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention, the heat exchanger may further include cooling fins disposed inside each of the plurality of tubes.

Additionally, in the water-cooled intercooler assembly of the lean burn intake system according to an embodiment of the present invention, the cooling fins may be bent in a zigzag shape and joined to the inner surfaces of each of the plurality of tubes.

Additionally, in the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention, the heat exchanger may further include a bypass pipe member coupled to the supporter to form the bypass passage therein.

Additionally, in the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention, the bypass pipe member is connected to the charge air inlet of the inlet tank and the intake air through the bypass passage at the center of the heat exchange unit. A manifold can be connected.

Additionally, in the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention, the valve assembly is rotatably coupled to the inlet tank, and includes a valve rotation shaft connected to the actuator and a valve corresponding to the bypass passage. It may include a valve body fixed to the valve rotation axis in position.

Additionally, in the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention, the valve body is provided in the form of a circular flap and may be arranged in a direction perpendicular to the axial direction of the valve rotation axis.

Additionally, in the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention, the valve rotation axis may be rotatably coupled to a lower portion of a bypass pipe member disposed along the bypass passage.

Embodiments of the present invention can improve engine performance and fuel efficiency by minimizing the impact of excessive heat generation of electrified components and applying a structure that bypasses the charge air to minimize the flow resistance of the charge air.

In addition, effects that can be obtained or expected due to embodiments of the present invention will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects expected according to embodiments of the present invention will be disclosed in the detailed description to be described later.

Since these drawings are for reference in explaining exemplary embodiments of the present invention, the technical idea of the present invention should not be interpreted as limited to the attached drawings.
1 is a block diagram schematically showing an example of a vehicle engine to which a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention is applied.
Figure 2 is a combined perspective view showing a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention.
Figure 3 is an exploded perspective view showing a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention.
Figure 4 is a cross-sectional view showing a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention.
Figure 5 is a diagram illustrating a plurality of tubes applied to a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention.
Figure 6 is a diagram illustrating a valve assembly applied to the water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention.
7 and 8 are diagrams for explaining the operation of the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention.
The drawings referenced above are not necessarily drawn to scale and should be understood as presenting a rather simplified representation of various preferred features illustrating the basic principles of the invention. The specific design features of the invention, including, for example, specific dimensions, orientation, location, and shape, will be determined in part by the particular intended application and usage environment.

With reference to the attached drawings, embodiments of the present disclosure will be described in detail so that those skilled in the art can easily practice them. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present disclosure, parts unrelated to the description have been omitted, and identical or similar components are assigned the same reference numerals throughout the specification.

In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, so the present disclosure is not necessarily limited to what is shown in the drawings, and the thickness is enlarged to clearly express various parts and areas. It was.

Hereinafter, a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present disclosure will be described in detail with reference to the attached drawings.

1 is a block diagram schematically showing an example of a vehicle engine to which a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention is applied.

Referring to FIG. 1, the water-cooled intercooler assembly 100 of a lean-burn intake system according to an embodiment of the present invention can be applied to a hybrid vehicle that uses both the driving force of the engine and electric power.

Furthermore, the water-cooled intercooler assembly 100 of the lean burn intake system according to the embodiment of the present invention can be applied to the lean burn engine 1 of a hybrid vehicle. The lean-burn engine 1 can maximize performance and fuel efficiency while implementing low-temperature combustion using a lean combustion mode at the highest thermal efficiency operating point.

This lean-burn engine 1 includes an intake system 7 that supplies compressed supercharged air to the intake manifold 5 through a supercharger 3 (e.g., an electric supercharger).

The intake system 7 further includes a water-cooled intercooler assembly 100 of the lean-burn intake system according to an embodiment of the present invention, which cools the turbocharged air compressed by the supercharger 3 as coolant. Here, the water-cooled intercooler assembly 100 of the lean-burn intake system according to an embodiment of the present invention may be formed integrally with the intake manifold 5.

Meanwhile, the hybrid vehicle has a low-temperature integrated cooling circuit (2) that cools the components of the lean-burn engine (1) and the electric motor (PE) components (9). The low-temperature integrated cooling circuit (2) supplies coolant to the supercharger (3), the electric motorization component (9), the low-temperature radiator (4), and the lean-burn intake system according to an embodiment of the present invention by driving the water pump (6). It can be circulated through the water-cooled intercooler assembly 100.

In this specification, based on the drawings, the components will be described by taking as an example the water-cooled intercooler assembly 100 of the lean-burn intake system according to an embodiment of the present invention arranged in the vertical direction.

In addition, in this specification, 'top', 'upper part', 'top' or 'upper surface' of a component refers to the end, portion, edge, or surface of the component that is relatively on the upper side in the drawings, and refers to the end, portion, end, or surface of the component. 'Bottom', 'bottom', 'bottom' or 'lower surface' refers to the end, portion, stage, or face of a component that is relatively lower in the drawing.

Furthermore, in this specification, an end of a component (e.g., one end or another end, etc.) refers to the end of the component in any one direction, and an end of the component (e.g., one end or another end, etc.) refers to the end of the component in any one direction. end, etc.) refers to a portion of a component including the end.

The water-cooled intercooler assembly 100 of the lean-burn intake system according to an embodiment of the present invention has a structure that bypasses the charge air to minimize the effect on heat generation of the electric part 9 and minimizes the flow resistance of the charge air. It comes true.

FIG. 2 is a combined perspective view showing a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention, FIG. 3 is an exploded perspective view showing a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view showing a water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention.

1 to 4, the water-cooled intercooler assembly 100 of the lean-burn intake system according to an embodiment of the present invention basically includes a housing 10, a heat exchange unit 20, an inlet tank 50, and a valve. It includes an assembly (70).

In an embodiment of the present invention, the housing 10 (commonly referred to as a 'can' by those skilled in the art) may, in one example, be provided in a cylindrical shape with the upper and lower ends open.

The housing 10 is coupled to the intake manifold 5 through its upper end. The intake manifold 5 distributes supercharged air to each cylinder of the engine and has a structure through which blow-by gas can flow.

Here, the intake manifold 5 may be made of plastic material. Additionally, the upper end of the housing 10 may be coupled to the intake manifold 5 through a clamp 11.

In an embodiment of the present invention, the heat exchange unit 20 is configured to cool the supercharged air supplied by the supercharger 3 (see FIG. 1 below) through cooling water. In addition, the heat exchange unit 20 is capable of bypassing the supercharged air supplied by the supercharger 3 to the intake manifold 5 without cooling it with coolant.

The heat exchange unit 20 is installed inside the housing 10. This heat exchange unit 20 includes a plurality of tubes 21, cooling fins 23, a supporter 25, and a bypass pipe member 27.

As shown in FIG. 5, the plurality of tubes 21 are arranged in concentric circles at set intervals. Each of the plurality of tubes 21 forms inside a charge air passage 31 connected to the intake manifold 5. The charge air passage 31 flows the charge air supplied by the supercharger 3 and can be supplied to the intake manifold (5).

In one example, each of the plurality of tubes 21 may be provided in a 1/4 arc shape along the circumferential direction. These plurality of tubes 21 may be arranged to be spaced apart along the circumferential and radial directions to form a bypass passage 33 along the inner center of the housing 10. That is, the plurality of tubes 21 are arranged to be spaced apart along the circumferential and radial directions with the bypass passage 33 at the center (eg, central portion).

The bypass passage 33 is connected to the intake manifold 5 and is designed to bypass the supercharged air supplied by the supercharger 3 to the intake manifold 5.

The cooling fins 23 are disposed inside each of the plurality of tubes 21, that is, in the charge air passage 31. In one example, the cooling fins 23 are bent in a zigzag shape and have a structure in which the outer surface is brazed to the inner surface of each of the plurality of tubes 21. These cooling fins 23 can improve the heat exchange efficiency between coolant and charge air.

The supporter 25 (commonly referred to as a 'header' by those skilled in the art) fixes a plurality of tubes 21 to the inside of the housing 10, sets the gap between the plurality of tubes 21, and sets a plurality of tubes 21. A coolant passage 35 through which coolant flows (or passes) is formed between each of the tubes 21.

The supporter 25 is coupled to the upper and lower ends of the housing 10, respectively. Here, the supporter 25 seals (or seals) the upper and lower ends of the cooling water passage 35 formed between the plurality of tubes 21, connects each of the plurality of tubes 21, and supplies the cooling water. A flow passage can be formed.

Here, the housing 10 supplies coolant to the coolant passage 35 and includes a coolant inlet 13 and a coolant outlet 15 configured to discharge the coolant flowing along the coolant passage 35. I'm doing it.

The coolant inlet 13 is formed in the shape of a nipple, is provided at the top of the housing 10, and is connected to the coolant passage 35. In addition, the coolant outlet 15 is formed in the shape of a nipple, is provided in the lower part of the housing 10, and is connected to the coolant passage 35.

Additionally, the bypass conduit member 27 is disposed along the bypass passage 33 and may be provided in a cylindrical shape with the upper and lower ends open. The bypass conduit member 27 is coupled to the supporter 25 through its upper and lower ends.

The bypass pipe member 27 is disposed in the vertical direction at the center of the heat exchange unit 20, and may form a bypass passage 33 therein. This bypass pipe member (27) is connected to the intake manifold (5) through the bypass passage (33).

In an embodiment of the present invention, the inlet tank 50 is configured to introduce the supercharged air supplied by the supercharger 3 into the supercharge air passage 31 and the bypass passage 33. The inlet tank 50 is connected to the supercharger 3 and may be coupled to the lower end of the housing 10.

The inlet tank 50 includes a charge air inlet 51 connected to the charge air passage 31 and the bypass passage 33. The inlet tank 50 houses a charge air inlet 51 and an intake manifold 5 through a bypass passage 33 by a bypass pipe member 27 at the center of the heat exchange unit 20. It can be connected along the inner center of (10).

Here, in one example, the inlet tank 50 may be made of aluminum, and in another example, it may be made of plastic. When the inlet tank 50 is made of aluminum, the inlet tank 50 and the housing 10 may be joined by brazing. Also, when the inlet tank 50 is made of a plastic material, the inlet tank 50 and the housing 10 can be coupled through a separate clamp.

In an embodiment of the present invention, the valve assembly 70 is configured to selectively open and close the bypass passage 33 of the bypass pipe member 27. The valve assembly 70 is installed in the inlet tank 50.

Figure 6 is a diagram illustrating a valve assembly applied to the water-cooled intercooler assembly of a lean-burn intake system according to an embodiment of the present invention.

Referring to Figures 1 to 6, the valve assembly 70 according to an embodiment of the present invention may be operated by driving the actuator 71. In one example, the actuator 71 is mounted on the boss 53 formed in the inlet tank 50 and may be provided as a motor capable of servo control of the rotation direction and rotation speed.

This valve assembly 70 includes a valve rotation shaft 73 and a valve body 75.

The valve rotation axis 73 moves in a direction across the inlet tank 50 at a position corresponding to the bypass passage 33 of the bypass pipe member 27 and the supercharged air inlet 51 of the inlet tank 50. It is placed. The valve rotation shaft 73 is rotatably installed in the inlet tank 50 and is connected to the actuator 71.

Here, the valve rotation shaft 73 may be rotatably supported (or coupled) to the lower part of the bypass pipe member 27.

The valve body 75 substantially opens and closes the bypass passage 33 of the bypass pipe member 27, and has a valve rotation axis ( 73).

In one example, the valve body 75 is provided in the form of a circular flap and may be arranged in a direction perpendicular to the axial direction of the valve rotation axis 73.

Hereinafter, the operation of the water-cooled intercooler assembly 100 of the lean-burn intake system according to the embodiment of the present invention configured as described above will be described in detail with reference to FIGS. 1 to 6 and the attached FIGS. 7 and 8.

7 and 8 are diagrams for explaining the operation of the water-cooled intercooler assembly of the lean-burn intake system according to an embodiment of the present invention.

Referring to FIG. 7, first, the bypass passage 33 of the bypass pipe member 27 is in a closed state by the valve body 75 of the valve assembly 70. Here, the valve body 75 closes the bypass passage 33 as the valve rotation shaft 73 rotates by driving the actuator 71.

In this state, the supercharged air compressed by the supercharger 3 flows into the supercharged air inlet 51 of the inlet tank 50, and flows into the bypass passage 33 from the inside of the inlet tank 50. Instead, it flows into the charge air passage 31 of the plurality of tubes 21 of the heat exchange unit 20, passes through the charge air passage 31, and is supplied to the intake manifold 5.

In the above process, the coolant flows into the coolant passage 35 of the heat exchanger 20 through the coolant inlet 13 of the housing 10, and the coolant passage 35 is formed between the plurality of tubes 21. It passes through and is discharged through the coolant outlet 15 of the housing 10.

Here, the coolant cools the motorized parts 9, and the water temperature is raised due to heat generation from the motorized parts 9. Accordingly, the charge air exchanges heat with the coolant and is supplied to the intake manifold 5 at an increased temperature.

Accordingly, in an embodiment of the present invention, fuel efficiency can be improved by expanding the EGR usage area due to an increase in intake air temperature in low temperature conditions. In addition, in an embodiment of the present invention, starting performance can be improved by improving fuel vaporization by increasing the intake air temperature in low-temperature outdoor temperature conditions. Accordingly, EM can be improved by suppressing the generation of HC due to non-combustion in the early stage of starting. .

Meanwhile, referring to FIG. 8, the valve body 75 of the valve assembly 70 opens the bypass passage 33 as the valve rotation shaft 73 rotates by driving the actuator 71.

In this state, the supercharged air compressed by the supercharger 3 flows into the supercharged air inlet 51 of the inlet tank 50, and flows into the bypass passage 33 from the inside of the inlet tank 50. , passes through the bypass passage (33) and is supplied to the intake manifold (5).

In the above process, the coolant flows into the coolant passage 35 of the heat exchanger 20 through the coolant inlet 13 of the housing 10, and the coolant passage 35 is formed between the plurality of tubes 21. It passes through and is discharged through the coolant outlet 15 of the housing 10.

Here, the coolant cools the motorized parts 9, and the water temperature is raised due to heat generation from the motorized parts 9. Accordingly, the charge air exchanges heat with the coolant and is supplied to the intake manifold 5 at an increased temperature.

Furthermore, the charge air passage 31 and the charge air inlet 51 of the plurality of tubes 21 are connected to each other, but the charge air flows into the charge air inlet 51 with the bypass passage 33 open. Since the flow resistance in the charge air passage 31 is relatively greater than the flow resistance in the bypass passage 33, the turbocharged air mainly flows into the bypass passage 33 and is supplied to the intake manifold 5. It can be. Accordingly, the inflow of charge air into the charge air passage 31 can be minimized, thereby minimizing heat transfer between the coolant and the charge air.

Accordingly, in the embodiment of the present invention, the supercharged air is bypassed to the intake manifold 5 through the bypass passage 33, thereby preventing heat generation from the motorized component 9 in the minimum supercharge amount section of the supercharged air. By preventing unnecessary heating of the charge air due to an increase in coolant temperature, engine performance can be improved by securing optimal volumetric efficiency.

In addition, in an embodiment of the present invention, under the bypass condition of the charge air, the flow resistance of the charge air is minimized by minimizing the flow of the charge air into the charge air passage 31, thereby improving performance through improvement of volumetric efficiency. can do.

Furthermore, in an embodiment of the present invention, during supercharging conditions or driving with low heat generation from the electric motorized parts 9 in low-temperature outdoor temperature conditions, EGR condensate is prevented from being generated due to excessive cooling of the supercharged air by the coolant through a bypass of the supercharged air. Deterioration in fuel efficiency due to suppression of EGR use can be improved.

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and can be implemented with various modifications within the scope of the claims, the detailed description of the invention, and the accompanying drawings, and this can also be done with various modifications. It is natural that it falls within the scope of the invention.

1: Lean burn engine 2: Integrated cooling circuit
3: Supercharger 4: Radiator
5: intake manifold 6: water pump
7: Intake system 9: Electrification parts
10: Housing 11: Clamp
13: Coolant inlet 15: Coolant outlet
20: heat exchange part 21: tube
23: cooling fin 25: supporter
27: Bypass pipe member 31: Supercharge air passage
33: bypass passage 35: coolant passage
50: Inlet tank 51: Supercharge air inlet
53: Boss 70: Valve assembly
71: Actuator 73: Valve rotation axis
75: valve body
100: Water-cooled intercooler assembly of a lean-burn intake system

Claims (11)

A housing whose upper and lower ends are open and coupled to the intake manifold through the upper end;
It includes a coolant passage through which coolant passes, a charge air passage connected to the intake manifold, and a bypass passage formed along the inner center of the housing and connected to the intake manifold, and a column installed inside the housing. exchange department;
an inlet tank including a charge air inlet connected to the charge air passage and the bypass passage, and coupled to a lower end of the housing; and
a valve assembly installed in the inlet tank and selectively opening and closing the bypass passage by driving an actuator;
A water-cooled intercooler assembly in a lean-burn intake system comprising a. According to claim 1,
The housing is,
A coolant inlet provided at the top and connected to the coolant passage, and a coolant outlet provided at the bottom and connected to the coolant passage.
A water-cooled intercooler assembly in a lean-burn intake system comprising a. According to claim 1,
The heat exchange part,
A plurality of tubes arranged concentrically at predetermined intervals and having the supercharged air passage formed therein,
A supporter coupled to the upper and lower ends of the housing, respectively, to set a gap between the plurality of tubes and to form the coolant passage between the plurality of tubes.
A water-cooled intercooler assembly in a lean-burn intake system comprising a. According to clause 3,
Each of the plurality of tubes,
A water-cooled intercooler assembly of a lean-burn intake system that is provided in an arc shape and is spaced apart along the circumferential and radial directions with the bypass passage at the center. According to clause 3,
The heat exchange part,
A water-cooled intercooler assembly of a lean burn intake system further comprising cooling fins disposed inside each of the plurality of tubes. According to clause 5,
The cooling fins are:
A water-cooled intercooler assembly of a lean-burn intake system that is bent in a zigzag shape and joined to the inner surfaces of each of the plurality of tubes. According to clause 3,
The heat exchange part,
A bypass conduit member coupled to the supporter to form the bypass passage therein.
A water-cooled intercooler assembly of a lean-burn intake system further comprising a. According to clause 7,
The bypass pipe member,
A water-cooled intercooler assembly of a lean burn intake system connecting the charge air inlet of the inlet tank and the intake manifold through the bypass passage, at the center of the heat exchange unit. According to claim 1,
The valve assembly is,
a valve rotation shaft rotatably coupled to the inlet tank and connected to the actuator;
A valve body fixed to the valve rotation axis at a position corresponding to the bypass passage.
A water-cooled intercooler assembly in a lean-burn intake system comprising a. According to clause 9,
The valve body is,
A water-cooled intercooler assembly of a lean-burn intake system that is provided in the form of a circular flap and arranged in a direction perpendicular to the axial direction of the valve rotation axis. According to clause 9,
The valve rotation axis is,
A water-cooled intercooler assembly of a lean-burn intake system rotatably coupled to a lower portion of a bypass pipe member disposed along the bypass passage.

Images